The Dahua DHI-ARA43-W2 is a wireless alarm repeater designed to extend the communication range between your alarm hub and connected peripherals. With support for up to 32 wireless devices, two-way RF communication, and automatic antenna switching, it ensures stronger, more stable signal transmission — even in large or partitioned environments.
Key Features
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Connects Up to 32 Devices - Expand your security network with support for multiple PIRs, door sensors, and other peripherals.
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Dual Antenna Switching - Automatically toggles between antennas to reduce signal dead zones and maintain stable transmission.
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Two-Way RF Communication - Ensures reliable data exchange between devices and the alarm hub with real-time status feedback.
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1000 m Communication Range - Excellent open-space range for large properties, multi-floor buildings, or distant garages.
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Cloud Update with Auto-Recovery - Stay up to date with firmware improvements remotely — with fail-safe restoration if an update fails.
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Built-in Backup Battery - Keeps the repeater running for up to 35 hours during power failures, ensuring system continuity.
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Tamper and Power Loss Detection - Immediately alerts users to tampering or external power disconnection.
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Signal Strength Detection - Helps installers identify optimal placement for consistent communication quality.
Perfect For:
- Multi-floor residential villas
- Detached garages or garden sheds
- Partition-heavy retail stores
- Expansive office spaces
- Small warehouses
- Clinics and medical centres
Install Tips
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Optimal Placement: Install centrally between alarm hub and distant accessories for best coverage.
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Wall or Desk Mounting: Suitable for flat surfaces or walls — keep clear of heavy obstructions.
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Signal Testing: Use signal strength detection during setup to find the best location.
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Battery Monitoring: Check backup battery life annually, especially for commercial installs.
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Manual vs Auto Pairing: Use manual pairing for critical devices to ensure path control.
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Use with DMSS App: Easily manage path selections and updates through the mobile app.
Downloads
Quick-Read Specs Card
| Feature |
Details |
| Wireless Devices |
Supports up to 32 devices |
| Communication |
Two-way RF, 433.1–434.6 MHz |
| Range |
Up to 1000 m (open space) |
| Antenna |
Dual antenna with auto switching |
| Backup Battery |
Yes – 35-hour lithium backup |
| Tamper Detection |
Yes |
| Pairing Modes |
Manual or Auto |
| Power Supply |
12 VDC, 1.5 A |
| Installation Options |
Wall mount or desktop |
| Encryption |
AES128 |
Extra Info
Reliable Signal Bridging
The ARA43-W2 functions as an intelligent signal repeater, designed to extend the communication range of your wireless alarm system. Acting as a bridge between the main alarm control panel (hub) and remote sensors or devices, it ensures stable message transmission even in large or complex environments. This feature is especially beneficial in installations where wireless signals are weakened by thick walls, metal structures, or long distances—such as in multi-story buildings, warehouses, or expansive properties. By retransmitting data securely and in real time, the repeater helps eliminate communication blind spots and ensures that every connected sensor remains in sync with the system.
Dual Antenna for Fewer Dead Zones
To further enhance signal stability, the ARA43-W2 is equipped with dual antennas and intelligent auto-switching technology. The system continuously monitors signal strength and quality from both antennas. If it detects a degradation or weak signal on the primary antenna—due to interference or environmental obstacles—it automatically switches to the secondary antenna without interrupting communication. This dual-antenna redundancy significantly reduces the likelihood of signal dropouts, enhances coverage, and ensures consistent performance across complex layouts with varying levels of RF interference.
Power Fail-Safe Design
In critical situations such as power outages, maintaining uninterrupted communication between alarm devices is essential. The ARA43-W2 addresses this with a built-in rechargeable lithium battery that provides up to 35 hours of backup operation. This ensures the repeater continues functioning independently even if the main power supply is cut, preserving the integrity of the security system and enabling the alarm panel to remain connected to all peripheral devices. This fail-safe design makes it highly reliable for applications where continuous protection is non-negotiable, such as in commercial, industrial, or remote residential sites.
Smart Pairing with Auto Pathing
Setting up the ARA43-W2 is simple and flexible, with support for both manual and automatic pairing modes. Through the DMSS mobile app or compatible system management software, devices can be added to the network with just a few taps. What’s more, the system features auto pathing technology, which intelligently determines the most efficient and stable communication route between each sensor and the hub. This dynamic path optimization ensures that devices are always connected through the most reliable repeater node, boosting overall system performance, minimizing latency, and reducing the chance of message loss.
Q&A
Q: How far can this repeater extend my alarm system range?
A: Up to 1000 metres in open space. Real-world range will vary depending on walls and materials.
Q: Can this run during power outages?
A: Yes, it includes a built-in battery that powers the unit for up to 35 hours if external power is lost.
Q: How many devices can I connect to it?
A: The ARA43-W2 supports up to 32 wireless accessories such as PIRs, door contacts, and sirens.
Q: Does it automatically reconnect after power loss or signal drop?
A: Yes, the repeater and paired devices auto-reconnect and continue normal operation after recovery.
Q: Is it compatible with third-party alarm systems?
A: It’s designed specifically for Dahua RF433-based systems and may not integrate with other brands.
Q: Can I see the repeater’s status remotely?
A: Yes, through the DMSS app you can view status and control settings if your system is connected to the cloud.
Q: What happens if a firmware update fails?
A: The device will automatically roll back to the previous firmware to ensure uninterrupted service.
Q: Does it require frequent battery replacements?
A: No — the internal lithium battery is rechargeable and primarily for backup, not daily use.
